fix: Add check for reset memory size to 0 in LoadTsFileMemoryManager

Add early return when memory block size equals target size to avoid unnecessary operations. Previously returning 0 memory could indicate invalid parameters.

Author: luoluoyuyu

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/load/memory/LoadTsFileMemoryManager.java

@@ -120,7 +120,11 @@ public synchronized LoadTsFileMemoryBlock allocateMemoryBlock(long sizeInBytes)
    */
   synchronized void forceResize(LoadTsFileMemoryBlock memoryBlock, long newSizeInBytes)
       throws LoadRuntimeOutOfMemoryException {
-    if (memoryBlock.getTotalMemorySizeInBytes() >= newSizeInBytes) {
+    if (memoryBlock.getTotalMemorySizeInBytes() == newSizeInBytes) {
+      return;
+    }
+
+    if (memoryBlock.getTotalMemorySizeInBytes() > newSizeInBytes) {
 
       if (memoryBlock.getMemoryUsageInBytes() > newSizeInBytes) {
         LOGGER.error(